Which of the following is not a mechanism for the development of autoimmune disorders?
A) exposure of previously "hidden" self-antigens to the adaptive immune system
B) a second exposure to an allergen
C) mutation followed by the appearance of membrane proteins not previously present
D) cross-reaction of antibodies formed against foreign antigens with self-antigens
B) a second exposure to an allergen
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Glucose -6-phosphate (G6P) binds to the enzyme glycogen synthase (GS), increasing the probability of enzyme-substrate binding. G6P is an example of a(n) ________. Based on its name, what do you think is the role of GS?
Fill in the blank(s) with the appropriate word(s).
Carbonic anhydrase is necessary for carbon dioxide transport
Indicate whether the statement is true or false
Elizabeth fell down a flight of stairs. The angle between her right foot and the tibia increased as her toes were bent toward the ground. What movement do you think caused her to injure her foot?
A) eversion B) abduction C) dorsiflexion D) plantar flexion
What are the most common receptors for hydrophilic intercellular messenger molecules?
A. peripheral membrane proteins B. integral membrane proteins C. specialized phospholipids within the membrane D. nucleic acids E. intracellular proteins